Article Photos: Thunder report card: B for Serge Ibaka's defense, A for Kevin Durant 9/39

Oklahoma City's Kevin Durant (35), Russell Westbrook (0), and  Kendrick Perkins (5) reacts uring game 1 of the Western Conference Finals in the NBA basketball playoffs between the Dallas Mavericks and the Oklahoma City Thunder at American Airlines Center in Dallas, Tuesday, May 17, 2011. Photo by Bryan Terry, The Oklahoman